Automatic phonograph stop



O. R. GRASS AUTOMATIC PHONOGRAPH STOP May 6 Filed Feb. 5, 1922 Patented May 6, 1924. v UNITED STATES 1,492,843 PATENT, OFFICE.

o'r'ro a GRASS, or EVANSTON, rumors, assmnon or oars-ms To max new, or

cmcaeo, rumors.

'AU'I'OIA'IIC PEONOGBAPH STOP. 1

Application filed February 8, 1922. Serial No. 538,842.

T all whom it may concern.

Be it known that'I, O'rro R. Guess, a citizen of the United States, resi at Evanston, in the county of Cook and btate of Illinois, have invented a certain new and useful Improvement in Automatic Phonogra h Stops, of which the following is a speci cation.

-My invention relates to automatic stops for phonographs, and particularly to a stop which is ad'ustable and which includes a combined in icator and control whereby the stop may be set to stop the rotation of the record at any predetermined point. Other objects will appear from time to time in the course of the specification.

i I illustrate my invention more or less diagrammatically in the accompanying drawings, wherein- Figure 1 is a plan view of my device;

Figure 2 is a similar plan view with the stop set at a different position;

Figure 3 is a section on the lines 3-3 of Fig. 2;

Figure 4 is a section on the lines 4-4 of Fig. 2.

Like parts are indicated by like characters throughout the drawings and specification. I

A is a tone arm of'a honogra h, rotatable on the axis A. is a p ate se-' cured by any suitable means to the top of the phonograph casing. O is the periphe of the turntable.

ilivoted on the plate B, at D is a block D which is apertured as at D, said apertures extending horizontall along either side of the pivot pin D. enetrating them are the parallel pins E E, which are secured to a cross-arm or block E, on which is pivoted a stop arm E having a quadrant portion E slotted as E. Penetrating the member E and passing through the slot E is a screw or other locking means E, whereb the uadrant may be adjustably locke in p ace. lllilpwardly projectin from the stop arm is the stop E, adapted to be engaged by the tone arm, as shown in Fig. 2.

Pivoted to the cross-bar .E is a longitudinal' bar F, the outer end of which is toothed to form a rack F in mesh with a pinion F, to which is adjustably secured an lndiator arm F adapted to be rotated by the pinion about a graduated indicating disk F, the pinion and arm bein secured against rotation on a shaft F WhlCll enetrates the indicatin disk or dial. A t umb screw F permits t e indicating arm to be ad'usted in relation to the pinion and rack. 00

igidly secured to the opposite side of the wet plate D is the arm G, which is notc ed to engage a sto G in contact with which it is norma y held b yielding means, such as the spring termlnates in an arcuate portion G, the outer end of which is ada ted to engage an upwardlyI projectin lug on the ivot plate H 1 is provided with a hand e H m rigid relation. thereto, and an arm H,

upwardly projecting from which is the member H adapted, when in one osition to engage the edge of the turnta ile and stop it. It may be made of rubber or an other frictional material. projects from the pivoted disk H and has secured to it the spring H, the o posite end of which is fastened to the p ate B, as at H.

It will be obvious that while I have illusw trated and described an operative device, many changes might be made in the number, size, shape, relation and disposition of parts, w1thout departing from the spirit of my invention. The use and operation of my invention are as follows:

The turntable engaging member H is normally keptout of contact therewith dur ing the rotation thereof by the engagement of the lug H with the arcuate end of the arm G, which is held against the stop G by the spring G. The latch is trip d by the tone arm, which, as it approac es the center of the turntable on the completion of various sizes of machine and various diameters and shapes of tone arm, lay rotating it on its pivot and setting'it in xed position by means of. the screw and quadrant. The stop is accuratelv set for an size of record by initially setting the in lcating arm or iii Another. arm

elug H. Th 1 needle. Arbitrarily taking 45 as a number, as shown in Fig.-- 2, the vertical sto E is set in a position to be tripped by the tone arm at the end of a relatively short record. Where the record islonger, the indicating arm or needle may be rotated about to the position 5, for example as shown in Fig. 1. This rotation. through the pinion and the rack, gives an axial motion to the longitudinal bar F in the direction of the pivot plate D and moves the parallel pins E and E further into the apertures D and D on either side of the pivot. The vertical stop is thereby moved nearer the center of the machine and is not reached by the tone arm until after a longer excursion thereof. When the size of the record has been determined by experiment, the proper index mark may be put thereon and when it is played again the indicating finger may be moved to the appropriate position.

When the tone arm has been withdrawn and a new record is in place, the machine may be started by the use of the handle H whlch rotates the plate H until the lug 11 passes beyond the arcuate end G and the sprin G then forces the arm G a ainst the stop The spring 1d then pul s the lug H against the end G8 and it remains in that position until again tripped by the tone arm.

I claim:

1. An adjustable pivot connection comprising a pivoted member, a plurality of apertures therein at either side of the pivot, and a plurality of pins, one adapted to penetrate each of said apertures and to be longitudinally adjustable therealon in unison.

2. An adjustable turn table brake tripping connection for phonographs comprismg a ivoted member, a plurality of apertures tlierein at either side of the pivot, and a. plurality of pins adapted one to penetrate each of such apertures and to be longitudinally adjusted therealong in unison.

3. An adjustable turn table brake tripping connection for phonographs comprismg a pivoted member, a plurality of apertures therein at either side of the pivot, and

a plurality of pins adapted one to penetrate each of such apertures and to be longitudinally adjusted therealong in unison. and an indicating member connected to said pins.

4. An adjustable turn table brake tripping connection for phonogra comprismg a pivoted member, a plura ity of apertures therein at either side of the pivot, and

a plurality of pins adapted one to penetrate each of such apertures and to be longitudinally adjusted therealong in unison, an indicatin member connected to said pins, an indicating dial and an indicating finger rotating thereabout, and. a rack and pinion connection between said finger and said indicating member.

5. An adjustable turn tie b said pins.

' masses in connection for phono a he comprisi ng a pivoted member, a p l ltfilty of apertures therein at either side of the pivot, and a plurality of pins adapted one to penetrate each of such apertures and to be longitudinally adjusted therealong in unison, and an indicating member pivotally connected to said pins.

6. An adjustable turn table brake tripping connection for phonographs comprising a. 7 pivoted member, a plurality of apertures therein at either side of the pivot, and a plurality of pins adapted one to enetrate each of such apertures and to be ongitudinally adjusted therealong in unison, an indicating member pivotally connected to said pins, an indicating dial and an indicating finger rothereabout, and a rack and pinion connection between said finger and said indicating member.

7. An adjustable turn table brake tripping connection for phonogra hs comprismg a pivoted member, a plura ity of apertures therein at either side of the pivot, and a plurality of pins adapted one to penetrate each of such apertures and to be longitudinally adjusted therealong in unison, and an indicating member pivotally connected to said pins, a projecting stop associated with 8. An adjustable turn table brake tripping connection ior phono ra hs comprismg a ivoted member, a p ura ity of apertures t erein at either side ofthe pivot, and a plurality of pins adapted one to penetrate each of such apertures and to be longitudinaily adjusted therealong in unison, an indicating member pivotally connected to said pins, an indicating dial and an indicatin nger rotating thereabout, and a rack r pinion connection between said finger and said indicating member, a projecting stop sociated with said pins.

9. An adjustable brake tripping connection for phonographs comprising a pivo member, a plurality of a rtures one on each side of the pivot, paralle pins adapted to be longitudina ly ad usted in unison along said apertures, indicating means pivotall con nected to said i an indicating ial, a finger, and a rac and pinion connection tween said finger and said indicatue: men and a trip stop adjustably moun on indicating means.

10. An adjustable brake tripping coection for phonoaphs comprising a pivo member, a plurality of a ertures one on each side of the pivot, para el pins adapw? to be longitudinally adjusted in unison said apertures, indicating means pivotally connected to said pins, an indicating dial, a finger, and a rack and pinion connection tween said finger and said indicati't means and a trip stop adjustably mounte on said indicat means, a elent in d lei) connection with said 'ptvoted member, and yielding means adapted to hold it normally in operative position.

11. In a trip'for phonographs, a stop element adapted to contact the tone arm of the phonograph, a brake element adapted to engage t e turn table of the phonograph and a tripping connection between such stop and such brake, the stop comprising a horizontal portion and a vertical portion ada ted to be engaged by said tone arm, the orizontal' portion being pivoted at one point to the tripping connection and having an adjusting qua rant and slot for ad usting it to various slzes and positions of tone arm.

12. An adjustable stop mechanism for phonographs comprising a pivoted -trigger element, a pivoted brake element adapted to he held nornmlly inoperative thereby,-a tone arm, a stop on said trigger element adapted to be contacted thereby to release the brake at the expiration of the playing excursion of the tone arm, yielding means adapted to hold the trigger element normally in operative engagement with the brake element and 'a stop against which said trigger element is adapted to be positioned normally to align it with said brake element.

Signed at Chicago, county of Cook, and State of Illinois, this 25th day of January,

OTTO R. GRASS. 

